Slipper clutch mod, oops? - Yamaha R6 Forum: YZF-R6 Forums
 2Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 18 (permalink) Old 05-21-2013, 04:12 PM Thread Starter
I eat my R6
 
WolFeYeZ's Avatar
 
Join Date: Mar 2011
Location: Denver
Posts: 170
Bike: 06 R6 Race, 05 R6 Street
Slipper clutch mod, oops?

So, I replaced the clutch right before my last race weekend and noticed that Ref #17 in the following diagram had no fingers left (all 3 of them):

To view links or images in this forum your post count must be 5 or greater. You currently have 0 posts.


The previous owner said the slipper clutch mod was done, removing the fingers on two of the springs. I found the 3rd spring with NO fingers left, and the fingers floating around next to it seemingly broken off. I removed the broken fingers (now basically 3 washers on this part of the bike) and put the clutch back together.

Ran it over the weekend and won my races... now a little late, trying to figure out what I need to do about these spring fingers? Clutch worked great all weekend and the slipping on downshifts was just about perfect. Do I need to install a new Ref #17 spring? or Two? or 1.5...
To view links or images in this forum your post count must be 5 or greater. You currently have 0 posts.
What is not having these springs going to do to the bike?

Details:
06 r6r
slipper clutch mod
Race bike
Seems to work fine now
WolFeYeZ is offline  
Sponsored Links
Advertisement
 
post #2 of 18 (permalink) Old 05-21-2013, 04:25 PM
"The Dude abides .. "
 
MELK-MAN's Avatar
 
Join Date: Jun 2006
Location: tampa
Posts: 4,719
Bike: 2008 yamaha R6 - 2 bikes
Re: Slipper clutch mod, oops?

you must have ONE of those 3 springs with fingers. You can't run 3 "washers" .. you need 1 complete. You can cut fingers off the other 2 if you want. Or a combination of the 3. Some will cut 6mm off the middle spring fingers, and 12mm off the top spring's fingers.
But you can't run 3 round washers (no fingers on any of the 3). The ramp style slipper clutch can not operate without the "Y" spring in place pushing on the center hub.

MICHELIN, EBC, Proflow Technologies
Silkolene, JenningsGP, Engine Ice, Sharkskinz, Pit-Bull


Greg Melka - CCS roadracing and FTR harescrambles

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

My racin n' ridin youtube vids
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by MELK-MAN; 05-21-2013 at 04:33 PM.
MELK-MAN is offline  
post #3 of 18 (permalink) Old 05-21-2013, 04:37 PM
Make good choices.
 
thedub's Avatar
 
Join Date: Jan 2011
Location: Gardnerville, NV
Posts: 2,808
Bike: R6, SV, KTM300, Tiger 800
Re: Slipper clutch mod, oops?

Quote:
Originally Posted by MELK-MAN View Post
But you can't run 3 round washers (no fingers on any of the 3). The ramp style slipper clutch can not operate without the "Y" spring in place pushing on the center hub.
But it sounds like he did. And not only did he run it with three washers having no fingers, he won his races.

So what is the consequence? Catastrophic failure obviously did not occur. Accelerated wear? Decreased slipper clutch performance?
thedub is offline  
 
post #4 of 18 (permalink) Old 05-21-2013, 04:49 PM
"The Dude abides .. "
 
MELK-MAN's Avatar
 
Join Date: Jun 2006
Location: tampa
Posts: 4,719
Bike: 2008 yamaha R6 - 2 bikes
Re: Slipper clutch mod, oops?

Quote:
Originally Posted by thedub View Post
But it sounds like he did. And not only did he run it with three washers having no fingers, he won his races.

So what is the consequence? Catastrophic failure obviously did not occur. Accelerated wear? Decreased slipper clutch performance?
1st off, why did the springs break off. My guess is he did not center the nut in the y-spring. When you tighten the center hub nut and don't first ensure the collar of the nut goes into the springs (or spring and washers if you cut springs), you smash the "Y" springs. There are also locating tabs on each of the 3 springs in the center that need to go into the 3 grooves of the center hub. Again, those can break off if not installed correctly.

If you don't understand how the ramp style center hub works against the clutch basket, look at a detailed exploded view..
Without 1 spring in place, you have a slipper clutch that will not work, and who knows what else.. I would tell you what it could do, if anyone didn't run the springs the way you are supposed to do.. but we don't.
You could run a race with no body work, but why would you do that ? You could run with an extra metal plate in the clutch stack putting the stack height beyond spec, but why would you do that?? So just because he won his races does not mean that you should CONTINUE to run the clutch without at least one clutch spring and the 2 washers (with fingers cut off) in place.

MICHELIN, EBC, Proflow Technologies
Silkolene, JenningsGP, Engine Ice, Sharkskinz, Pit-Bull


Greg Melka - CCS roadracing and FTR harescrambles

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

My racin n' ridin youtube vids
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MELK-MAN is offline  
post #5 of 18 (permalink) Old 05-21-2013, 04:53 PM Thread Starter
I eat my R6
 
WolFeYeZ's Avatar
 
Join Date: Mar 2011
Location: Denver
Posts: 170
Bike: 06 R6 Race, 05 R6 Street
Re: Slipper clutch mod, oops?

Know of a good place that would overnight one of these springs then?
WolFeYeZ is offline  
post #6 of 18 (permalink) Old 05-21-2013, 05:01 PM
"The Dude abides .. "
 
MELK-MAN's Avatar
 
Join Date: Jun 2006
Location: tampa
Posts: 4,719
Bike: 2008 yamaha R6 - 2 bikes
Re: Slipper clutch mod, oops?

and because i can't let well enough alone
To view links or images in this forum your post count must be 5 or greater. You currently have 0 posts.
here's the "why" ya can't (or should i say shouldn't) run with no springs.. the slipper will NOT work, and without the spring to keep the hub down even when there is no backtorque applied, the hub could jump.

I don't have a spare basket layin around, but this is the center hub, and all the grooves around the outside is what metal plate grooves ride on and drive with. The "Y" spring with a nut on top holds the hub DOWN when there isn't backtorque being applied (backtorque is applied when you decel).

To view links or images in this forum your post count must be 5 or greater. You currently have 0 posts.




Here is the underside of the hub showing the 3 "ramps" that interfaces with 3 opposing "ramps" of the clutch basket.. you can CHANGE the rate at which the clutch slips by:
1) altering the # of "Y" springs.
2) altering the # of "Y" springs AND using shims to hold down or raise them.
3) alter the stack height of the clutch stack.
4) alter the clutch pressure plate springs (go from stock to kit springs-firmer)

but YOU HAVE TO HAVE 1 of the "Y" springs in place to hold the center hub down when you are ON the gas..


To view links or images in this forum your post count must be 5 or greater. You currently have 0 posts.
600racer likes this.

MICHELIN, EBC, Proflow Technologies
Silkolene, JenningsGP, Engine Ice, Sharkskinz, Pit-Bull


Greg Melka - CCS roadracing and FTR harescrambles

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

My racin n' ridin youtube vids
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by MELK-MAN; 05-21-2013 at 05:04 PM.
MELK-MAN is offline  
post #7 of 18 (permalink) Old 05-21-2013, 05:07 PM Thread Starter
I eat my R6
 
WolFeYeZ's Avatar
 
Join Date: Mar 2011
Location: Denver
Posts: 170
Bike: 06 R6 Race, 05 R6 Street
Re: Slipper clutch mod, oops?

Quote:
Originally Posted by MELK-MAN View Post
and because i can't let well enough alone
To view links or images in this forum your post count must be 5 or greater. You currently have 0 posts.
here's the "why" ya can't (or should i say shouldn't) run with no springs.. the slipper will NOT work, and without the spring to keep the hub down even when there is no backtorque applied, the hub could jump.

I don't have a spare basket layin around, but this is the center hub, and all the grooves around the outside is what metal plate grooves ride on and drive with. The "Y" spring with a nut on top holds the hub DOWN when there isn't backtorque being applied (backtorque is applied when you decel).

To view links or images in this forum your post count must be 5 or greater. You currently have 0 posts.




Here is the underside of the hub showing the 3 "ramps" that interfaces with 3 opposing "ramps" of the clutch basket.. you can CHANGE the rate at which the clutch slips by:
1) altering the # of "Y" springs.
2) altering the # of "Y" springs AND using shims to hold down or raise them.
3) alter the stack height of the clutch stack.
4) alter the clutch pressure plate springs (go from stock to kit springs-firmer)

but YOU HAVE TO HAVE 1 of the "Y" springs in place to hold the center hub down when you are ON the gas..


To view links or images in this forum your post count must be 5 or greater. You currently have 0 posts.
Want to sell that Y-spring you got there?
To view links or images in this forum your post count must be 5 or greater. You currently have 0 posts.
WolFeYeZ is offline  
post #8 of 18 (permalink) Old 05-21-2013, 05:08 PM Thread Starter
I eat my R6
 
WolFeYeZ's Avatar
 
Join Date: Mar 2011
Location: Denver
Posts: 170
Bike: 06 R6 Race, 05 R6 Street
Re: Slipper clutch mod, oops?

Quote:
Originally Posted by MELK-MAN View Post
1st off, why did the springs break off. My guess is he did not center the nut in the y-spring. When you tighten the center hub nut and don't first ensure the collar of the nut goes into the springs (or spring and washers if you cut springs), you smash the "Y" springs. There are also locating tabs on each of the 3 springs in the center that need to go into the 3 grooves of the center hub. Again, those can break off if not installed correctly.
Ive had this bike a month now and that was the first time I had the clutch open... prior owner probably did one of those :
WolFeYeZ is offline  
post #9 of 18 (permalink) Old 05-21-2013, 05:11 PM
"The Dude abides .. "
 
MELK-MAN's Avatar
 
Join Date: Jun 2006
Location: tampa
Posts: 4,719
Bike: 2008 yamaha R6 - 2 bikes
Re: Slipper clutch mod, oops?

Quote:
Originally Posted by WolFeYeZ View Post
Want to sell that Y-spring you got there?
To view links or images in this forum your post count must be 5 or greater. You currently have 0 posts.
negative .. LOL.
funny enough they were apparently on back-order recently .. Eddie Craft, a pro racer from up north, desperate to get some for a rebuild he had just done, called me and i sold him my spares. It took a couple weeks to get my spares replaced.
To view links or images in this forum your post count must be 5 or greater. You currently have 0 posts.
I run 2 full, and 1 with 12mm cut (that cut one goes on top) but I like a good deal of engine braking. I know a number of racers that run 2 fully cut, with only 1 full. Again, you can put the full one on the very bottom with 2 "washers" (remainder of cut springs) on top (little more engine braking) or reduce the spring tension by putting a washer under the full spring.. but ya gotta run all 3 pieces, cut or otherwise.

MICHELIN, EBC, Proflow Technologies
Silkolene, JenningsGP, Engine Ice, Sharkskinz, Pit-Bull


Greg Melka - CCS roadracing and FTR harescrambles

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

My racin n' ridin youtube vids
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MELK-MAN is offline  
post #10 of 18 (permalink) Old 05-21-2013, 05:17 PM
Pobrecitos
 
Mac7504's Avatar
 
Join Date: May 2008
Location: Downey, CA
Posts: 19,910
Bike: 08 R6S + 08 R6LE
Re: Slipper clutch mod, oops?


To view links or images in this forum your post count must be 5 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Mac7504 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Yamaha R6 Forum: YZF-R6 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Slipper Clutch Mod... youngbulll General Discussions 191 12-27-2017 05:36 PM
Slipper Clutch mod vs. Aftermarket Slipper drago010 Track Tech & Riding Techniques 68 01-24-2012 11:37 AM
06-07 R6 Slipper Clutch Mod ichibon_kokojin How To's... 10 09-18-2009 09:06 AM
where?: How to MOD your slipper clutch 06-07 R6 kjeldorus How To's... 0 01-08-2008 07:51 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome